Draft-rigging.



G. A. TOWER.

DRAFT RIGGING.

APPLICATION FILED FEB. 23, 1905.

Patented Mar. 2, 1909.

uniiiililliillllliml IINVENTOR Q Q. 17mm WITNESSES unrrnn snaresentrant? CLINTON A. TOWER, OF CLEVELAND, OHIO, ASSIGNOR TO THE NATIONALMALLEABLE CASTINGS COMPANY, OF CLEVELAND, OHlO, A CORPORATION OF OHIO.

DRAFT-RIGGING.

Specification of Letters Patent.

Patented. March 2,

Application filed February 23, 1905. Serial No. 246,329.

To all whom it may concern:

Be it known that I, CLINTON A. TOWER, of Cleveland, Cuyahoga county,Ohio, have invented a new and useful Draft--Rigging, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhich Figure 1- is a side elevation of my draft rigging partly invertical section; Fi 2 is a vertical cross-section on the line I II ofFig: 1; and Figs. 3 and 4 are detail views.

n the drawings, 2 represents the draw bar, 3 is a yoke which extendsrearwardly therefrom, and 4, 5 are followers held respectively onopposite sides by means of the usual stops on the draft-timbers whichmay be a plied in the way in which stops are ordinarily applied to thefollowers of draft-riggings.

ese followers are curved on their inner faces and bear against thecurved faces of differential levers 6, 7, which have a rocking bearing 8at their meeting faces and are forked or slotted so as to extendoutwardly and preferably vertically downward beyond the line of thedraw-bar and over the yoke 3 which passes through the forked or slottedportions. By the term differential levers, is meant levers in which thefulcrum or point of application of pressure, or both, alter theirrelative positions, so that the lengths of the respective arms of thelevers are varied during the operation thereof. At the portions whichextend outside the yoke, there is an interposed spring or combination ofsprings 9, preferably mounted on a rod or bolt 10 whlch extends throughthe projecting ortions of the levers and is held referably y. a head 10at one end and by a k-ey or nut 10 at the other end. The outerfaces ofthe levers 6 and 7 may be slotted or recessed so as to fit over thecurved faces of the followers 4 and 5, and the meetin facesof the leversand,

followers, as well as t e meeting surfaces of the levers are preferablycorrespondingly curved and corrugated or provided with teeth which willhold them from slipping out of position and will insure their regularand even be interposed between the thimbles or levers and the head 10and nut 10 respectively.

When the draw-bar is subjected to a buffing stress it will move thefollower 5 rearwardly, and acting on the lever 7 will cause it to rockon the point 8 as a fulcrum, thus compressing the spring 9 and causingthe lever 6 to rock to an equal extent in the opposite direction. As thefollowers move inwardly the oints of contact between the re- 1 spectivefol owers 4, 5 and levers 6, 7 will shift gradually toward the innerends of the levers. This increases the length of the long arms of thelevers which bear upon the spring 9 and shortens the short arms whichare be tween the contact points of the followers4 5 and the point 8, andit thus increases t e effective resistance of the spring to the rho--tion of the follower as the bufiing increases in force. Meanwhile, thefollower 4 is held by its stops and affords the necessary resistance tothe lever 6. In pulling, the yoke 3 draws the follower 4 forwardly, andthe follower 5 is held by its stops. A. like action takes place withreference to theshifting of the room that it can readily be applied touse in all cases where draft-riggings of the kind now commonly employedare applicable.

The invention may be modified in many ways, Without departing from thedefinition thereof as stated in the claims, since What I claim is 1. Adraft-rigging having differential levers projecting downwardly beyondthe line of the draw-bar and having spring mechanisrn.

2. A draft-rigging comprising followers, differential levers bearingagainst each other and bearing on the followers, and a spring interposedbetween them.

3. A. draft-rigging comprising followers, a spring, and differentiallevers bearing against each other and bn the followers at their forwardand rear faces, and having their sole pivotal bearings at the saidbearing faces.

4. A draft-rigging comprising followers, 2. spring, and differentiallevers bearing against each other and on the followers at then forwardand rear faces, and projecting outwardly beyond the line of thedraw-bar.

5. A draft-rigging having followers, differential levers bearing againsteach other,

bearing also on the followers and projecting outwardly beyond the lineof the draw-bar parts and followers having toothed faces. 7

8. A draft-rig ing havmg levers. and a yoke, said levers eing slotted toadmit passage of the yoke and extending outwardly beyond the same, andspring-mechanism.

9. A draft-rigging compr1sing followers, differential levers bearingagainst each other and bearing on the followers, and a spring saidfollowers and levers being interfitted an having toothed meeting faces.

10. A draft-rigging having followers, dif- 12. A draftrigging havingdifferential levers and followers with corrugated bearing surfaces.

13. A draft rigging having differential levers and followers, themeeting surfaces of the levers with the followers being corrugated.

14. A draft rigging havingl a lever projecting downwar lower, and springmechanism actuated by the lever.

15. A draft-rigging having a yoke, a lever slotted to permit assage ofthe yoke and extending outward y beyond the same, arid spring-mechanismactuated by the lever.

In testimony whereof, I have hereunto set my hand.

a follower and CLINTON A. TOWER.

y from the fol-

